DOI: 10.1073/pnas.1917554117
论文题名: Seasonal hysteresis of surface urban heat islands
作者: Manoli G. ; Fatichi S. ; Bou-Zeid E. ; Katul G.G.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期: 13 起始页码: 7082
结束页码: 7089
语种: 英语
英文关键词: Cities
; Hysteresis
; Seasonality
; Surface temperature
; Urban heat island
Scopus关键词: rain
; soil water
; air pollution
; air temperature
; Article
; biosphere
; climate change
; controlled study
; energy conservation
; environmental aspects and related phenomena
; evaporation
; evapotranspiration
; geographic and geological phenomena
; greenhouse effect
; hysteresis
; island (geological)
; microclimate
; precipitation
; priority journal
; radiation and radiation related phenomena
; rural area
; seasonal variation
; solar radiation
; statistical model
; summer
; surface urban heat island
; temporal analysis
; thermal pollution
; urban area
; vegetation
; water availability
; winter
英文摘要: Temporal dynamics of urban warming have been extensively studied at the diurnal scale, but the impact of background climate on the observed seasonality of surface urban heat islands (SUHIs) remains largely unexplored. On seasonal time scales, the intensity of urban-rural surface temperature differences (ΔTs) exhibits distinctive hysteretic cycles whose shape and looping direction vary across climatic zones. These observations highlight possible delays underlying the dynamics of the coupled urban-biosphere system. However, a general argument explaining the observed hysteretic patterns remains elusive. A coarsegrained model of SUHI coupled with a stochastic soil water balance is developed to demonstrate that the time lags between radiation forcing, air temperature, and rainfall generate a ratedependent hysteresis, explaining the observed seasonal variations of ΔTs. If solar radiation is in phase with water availability, summer conditions cause strong SUHI intensities due to high rural evaporative cooling. Conversely, cities in seasonally dry regions where evapotranspiration is out of phase with radiation show a summertime oasis effect controlled by background climate and vegetation properties. These seasonal patterns of warming and cooling have significant implications for heat mitigation strategies as urban green spaces can reduce ΔTs during summertime, while potentially negative effects of albedo management during winter are mitigated by the seasonality of solar radiation. © 2020 National Academy of Sciences. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164264
Appears in Collections: 气候变化与战略
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作者单位: Manoli, G., Department of Civil, Environmental and Geomatic Engineering, University College London, London, WC1E 6BT, United Kingdom; Fatichi, S., Institute of Environmental Engineering, Eidgenossische Technische Hochschule Zurich, Zurich, 8093, Switzerland, Department of Civil and Environmental Engineering, National University of Singapore, Singapore, 117576, Singapore; Bou-Zeid, E., Department of Civil and Environmental Engineering, Princeton University, Princeton, NJ 08544, United States; Katul, G.G., Nicholas School of the Environment, Duke University, Durham, NC 27708, United States
Recommended Citation:
Manoli G.,Fatichi S.,Bou-Zeid E.,et al. Seasonal hysteresis of surface urban heat islands[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(13)